Straddling two continents, Istanbul is one of the world’s great cities — a place where Europe meets Asia and Christianity meets Islam. Founded as Byzantium, it became Constantinople, the capital of the Roman Empire, in 330 AD, ruled the Byzantine world for over a thousand years until 1453, then reigned as the heart of the Ottoman Empire. Every layer of that history is still here to explore. Here are its essential sights.
Hagia Sophia
The city’s greatest monument, Hagia Sophia was built in 537 as the largest cathedral in Christendom. After the Ottoman conquest in 1453 it became a mosque; from 1935 it served as a museum, and since 2020 it functions once again as a working mosque. Its vast dome and shimmering mosaics remain breathtaking, whatever the era.
The Blue Mosque
Facing Hagia Sophia across a garden square, the Sultan Ahmed Mosque — the “Blue Mosque,” built between 1609 and 1616 — is famous for the thousands of blue İznik tiles that line its interior and its six slender minarets. It is still an active place of worship, so dress modestly and mind prayer times.
Topkapi Palace
For nearly four centuries the seat of the Ottoman sultans, Topkapi Palace is a sprawling complex of courtyards, pavilions and gardens overlooking the Bosphorus. Its treasury and holy relics — dazzling jewels, thrones and sacred objects — and the famous Harem make it one of the richest museums in the world.
The Bazaars and the Bosphorus
No visit is complete without the labyrinthine Grand Bazaar, one of the oldest and largest covered markets on earth, and the fragrant Spice Bazaar nearby. Descend into the eerie, columned Basilica Cistern, then take a ferry up the Bosphorus — the strait dividing the city — for the finest views of Istanbul’s skyline of domes and minarets.
FAQ
How many days do you need in Istanbul?
Three to four days covers the historic Sultanahmet sights, the bazaars, a Bosphorus cruise and time to wander the neighbourhoods.
When is the best time to visit?
Spring (April–May) and autumn (September–November) offer mild weather and thinner crowds; summers are hot and winters cool and damp.
What is the nearest airport?
Istanbul Airport (IST) on the European side is the main hub; Sabiha Gökçen (SAW) on the Asian side serves many budget flights.
